LM2743MTCX

{
  "slug": "lm2743mtcx",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments DC-DC Converters, TSSOP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lm2743mtcx",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "lm2743mtcx.kicad_sym",
    "lm2743mtcx.kicad_mod",
    "lm2743mtcx.glb",
    "lm2743mtcx.step",
    "lm2743mtcx.lbr",
    "docs/hero.png",
    "docs/lm2743mtcx-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm2743mtcx-hero.glb",
    "lm2743mtcx-hero.overlay.json"
  ],
  "component": {
    "mpn": "LM2743MTCX",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-14",
    "pin_count": 14,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm2743",
    "parts": {
      "symbol": "lm2743mtcx.kicad_sym",
      "footprint": "lm2743mtcx.kicad_mod",
      "model_3d": "lm2743mtcx-hero.glb",
      "model_3d_plain": "lm2743mtcx.glb",
      "model_3d_step": "lm2743mtcx-etched.step",
      "model_3d_step_plain": "lm2743mtcx.step",
      "lbr": "lm2743mtcx.lbr"
    },
    "distributor_links": {
      "lcsc": "C2859810",
      "digikey": "2156-LM2743MTCX-ND",
      "mouser": "926-LM2743MTCX"
    },
    "distributor_check": {
      "checked_at": "2026-10-10T19:35:32Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-LM2743MTCX-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "926-LM2743MTCX",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BOOT",
        "type": "power_in",
        "description": "Bootstrap pin and supply rail for the gate drivers; when the high-side MOSFET turns on, this pin should be at least one gate threshold above the regulator input voltage VIN."
      },
      {
        "number": "2",
        "name": "LG",
        "type": "output",
        "description": "Low-gate drive for the low-side N-channel MOSFET, interlocked with HG (pin 14) to avoid shoot-through."
      },
      {
        "number": "3",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground and ground for the low-side MOSFET driver; must be connected together with pin 13 on the PCB to form a ground plane."
      },
      {
        "number": "4",
        "name": "SGND",
        "type": "power_in",
        "description": "Signal ground that should be connected appropriately to the ground plane following good switching regulator layout practices."
      },
      {
        "number": "5",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply rail for the control sections of the IC; the recommended supply voltage range is 3 V to 6 V."
      },
      {
        "number": "6",
        "name": "PWGD",
        "type": "output",
        "description": "Open-drain power-good output, typically pulled up to VCC or a low-voltage source with a resistor that keeps the current into the pin below 1 mA (100 kΩ recommended); it is pulled low on output under-voltage or over-voltage faults and under input UVLO."
      },
      {
        "number": "7",
        "name": "ISEN",
        "type": "passive",
        "description": "Current-limit threshold setting pin that sources a fixed 40 µA; a resistor connected from this pin to the drain of the low-side MOSFET (switch node) sets the limit."
      },
      {
        "number": "8",
        "name": "EAO",
        "type": "output",
        "description": "Error amplifier output, compared with an internally generated ramp to set the duty cycle; required for control-loop compensation."
      },
      {
        "number": "9",
        "name": "SS/TRACK",
        "type": "passive",
        "description": "Soft-start and tracking pin connected to the error amplifier non-inverting input during soft-start and whenever its voltage is below the internal reference; a minimum 1 nF capacitor to ground gives basic soft-start."
      },
      {
        "number": "10",
        "name": "FB",
        "type": "input",
        "description": "Feedback pin, the inverting input of the error amplifier used to sense the output voltage and compensate the loop."
      },
      {
        "number": "11",
        "name": "FREQ",
        "type": "passive",
        "description": "Frequency adjust pin; a resistor from this pin to ground sets the switching frequency (for example 324 kΩ for 100 kHz and 24.9 kΩ for 1 MHz)."
      },
      {
        "number": "12",
        "name": "SD",
        "type": "input",
        "description": "IC shutdown pin: pull to VCC to enable the IC and connect to ground to disable it, with both high-side and low-side drives off during shutdown."
      },
      {
        "number": "13",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground that must be connected together with pin 3 on the PCB to form a ground plane."
      },
      {
        "number": "14",
        "name": "HG",
        "type": "output",
        "description": "High-gate drive for the high-side N-channel MOSFET, interlocked with LG (pin 2) to avoid shoot-through."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The MPN as given (LM2743MTCX) is not listed verbatim in the package addendum; the matching orderable; Pin 13 is PGND only by inference: the pin-function table lists PGND as pin 3 with a stray '13' note ; Pin types are KiCad-class assignments made from the functional descriptions, not stated in the datas"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0497,
        "at": "2026-10-10T19:35:17"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm2743",
        "pages": 44,
        "sha256": "d1cfdbe28e1c6331",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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    "models_3d": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5.0,
          1.0
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3ee5786aae56190997aa793ba3cfc003fd616782770e29719b4562f012982245",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm2743mtcx-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": -0.0,
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        "sha256": "65cf5de833246cd8303c6c58a45be1a1f969508f7a9426e52183b6df154b57e0",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}